27091969 has 2 divisors, whose sum is σ = 27091970. Its totient is φ = 27091968.

The previous prime is 27091963. The next prime is 27091993. The reversal of 27091969 is 96919072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 620944 = 5145^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 27091969 - 2⁹ = 27091457 is a prime.

It is a super-2 number, since 2×27091969² = 1467949568593922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27091963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13545984 + 13545985.

It is an arithmetic number, because the mean of its divisors is an integer number (13545985).

Almost surely, 2^27091969 is an apocalyptic number.

It is an amenable number.

27091969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27091969 is an equidigital number, since it uses as much as digits as its factorization.

27091969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 27091969 is about 5204.9946205544. The cubic root of 27091969 is about 300.3402399027.

The spelling of 27091969 in words is "twenty-seven million, ninety-one thousand, nine hundred sixty-nine".